That's Roger, all right! I don't have the guts to take him up on his challenge myself. Although tube amps tend to clip more gracefully than solid state, you'd probably notice the sound becoming "hard", or congested or glarey, on loud passages or transients if the amp is starting to clip. I'm really not particularly technical, but my admittedly limited understanding is that the problem with electrostats is that they have difficult impedance levels at different frequencies, making them tough for many amplifiers to drive and causing some frequency response aberations as a result. Roger's amps are specifically designed to drive those types of loads. Maybe someone with more knowledge on this point, or specific experience with the Rogue and stats, could comment further. However, if your amp sounds fine as you say, I wouldn't worry much about it at this point, just enjoy the music!
